Mantis Jawbone with a petrol engine strapped on. Just because you can...

[W7Ford]

 

[Twozaskars]

Wow. Just wow.

 

[KermitGKona88]

Darwin Award in the making...

 

[M_Chavez]

So, electric MTBs are the best thing since sliced bread, but when a talented engineer installs a lawnmower engine on his enduro machine, he's in for the Darwin award?

 

[Twozaskars]

Are you certain that it’s a lawnmower engine? Looks more like an air compressor engine to me.